Credit Score Management

Can anyone really improve their credit score by self help books, software? Or do you need to go to an expert?

i want to know what credit repair company will help my credit score go up legally.

I have paid for alllllll of my ancient collection accounts and I’m just waiting for them to drop off of my credit reports. I’ve been looking into credit repair service on line and wondering if they can really help. All of the items on my reports are really MINE and I did really owe them, but they are all FINALLY paid off. Is there any hope to get them removed quickly?